Identify the element having positive electron gain enthalpy.

Would you expect the second electron gain enthalpy of $O$ to be positive,more negative,or less negative than the first? Justify your answer.

Correct order of electron affinity for $C$,$Si$,and $Ge$ is

The increasing order of electron affinity for the given electronic configurations of elements is:
$I. 1s^2 2s^2 2p^6 3s^2 3p^5$
$II. 1s^2 2s^2 2p^3$
$III. 1s^2 2s^2 2p^5$
$IV. 1s^2 2s^2 2p^6 3s^1$

For electron gain enthalpies of the elements denoted as $\Delta_{eg} H$,the incorrect option is :

The correct order of the electron gain enthalpy of the given elements is